20402202120 has 64 divisors (see below), whose sum is σ = 61225139520. Its totient is φ = 5438939904.

The previous prime is 20402202113. The next prime is 20402202127. The reversal of 20402202120 is 2120220402.

It is an interprime number because it is at equal distance from previous prime (20402202113) and next prime (20402202127).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20402202120.

It is not an unprimeable number, because it can be changed into a prime (20402202127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401674 + ... + 449606.

It is an arithmetic number, because the mean of its divisors is an integer number (956642805).

Almost surely, 2^20402202120 is an apocalyptic number.

20402202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402202120 is an abundant number, since it is smaller than the sum of its proper divisors (40822937400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402202120 is a wasteful number, since it uses less digits than its factorization.

20402202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51494 (or 51490 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20402202120 its reverse (2120220402), we get a palindrome (22522422522).

The spelling of 20402202120 in words is "twenty billion, four hundred two million, two hundred two thousand, one hundred twenty".